There are disclosed a benzo[b]furancarboxamide derivative of the formula
wherein Ra, Rb, Rc and Rd are a hydrogen atom or lower alkyl group, respectively; Re is a hydrogen atom, amino radical, lower alkylamino group or acylamino group; X is a hydrogen atom or halogen atom; and n is an integer of 1 - 5,
and including racemic compounds and stereo-isomers thereof, a salt of the compounds, a process for the preparation of the compounds and salts as well as their use as gastrointestinal motility-enhancing agents.
本发明涉及一种苯并[b]
呋喃羧酰胺衍
生物,其
化学式为 其中,Ra、Rb、Rc和Rd分别为氢原子或较低的烷基基团;Re为氢原子、
氨基基团、较低的烷基
氨基基团或酰基
氨基基团;X为氢原子或卤原子;n为1-5的整数,并包括其外消旋化合物和立体异构体、化合物的盐、制备化合物和盐的方法以及它们作为胃肠动力增强剂的用途。